VMIVME-017807-411001燃機卡件
控制器輸出具有MINSCALE和MAXSCALE參數，允許對輸出信號進行縮放默認值為0-100 PRCT以外的工程范圍。當控制器輸出為設置點到另一個控制器。
當自動調諧設置為“是”時，可使用調諧按鈕訪問自動調諧功能，并且可以：在回路處于自動或手動狀態(tài)時啟動。當啟動時，自動調諧器用開關控制代替PID功能，將A/M模塊置于Auto（如果處于Man）狀態(tài)，并通過六個開-關周期循環(huán)控制回路，同時學習其用于為PID控制器提供調整建議的過程動力學。
%DEV參數是在開關周期。該參數可以手動設置，也可以配置為自動。配置“自動”時自動調諧將%DEV設置為%HYS的4倍。這是提供良好自動調諧所需的最小值后果%HYS參數是在中切換輸出之前過程必須偏離設定值的量相反的方向。該值必須至少等于或略大于任何工藝噪聲帶。如果噪音無法確定頻帶，當%HYS參數已配置為自動。%階躍參數是閥門在第一個開-關循環(huán)中的變化量。在第一個循環(huán)之后autotuner將調整步長，以將進程保持在%DEV參數的值內。隨后自動調諧練習，該步驟將使用從上一練習計算的值，除非AT RESET參數設置為“是”或控制器已通電。自動調諧建議的動態(tài)響應可以是：配置為快速、中等或慢速。
介質設置通常會提供一個沒有或很少的響應超調至設定點階躍響應。
當POST AT參數設置為YES時，控制回路將使用推薦的調整值，除非測試期間出現警告。
有關自動調諧的更多詳細信息，請參見操作部分。PIDAG是一種自適應增益比例+積分控制器和是以下五種控制器類型之一：在每個循環(huán)一個的基礎上使用。它使用外部反饋來提供允許與其他人交互的整體動作
功能塊或外部設備，如氣動控制器、切斷開關。PIDAG消除了纏繞
這可能發(fā)生在其他控制器類型中。派生詞當參數TD為非零時提供動作。這個
控制器包括可啟動的自動調諧功能使用快速調諧功能從操作員面板中選擇。
The controller output has MINSCALE and MAXSCALE parameters allowing the output signal to be scaled for
engineering ranges other than the default of 0-100 PRCT. This may be necessary when the controller output is the
setpoint to another controller.
The Autotune feature is accessible using the TUNE pushbutton when AUTOTUNE is set to YES and can be
initiated while the loop is in Auto or Manual. The autotuner, when initiated, replaces the PID with an on-off control
function, places the A/M block in Auto (if in Man) and cycles the control loop through six on-off cycles while
learning the process dynamics which it uses to provide tuning recommendations for the PID controller.
The % DEV parameter is the maximum amount in % that the process should deviate from the setpoint during the
on-off cycles. This parameter can be set manually or can be configured as AUTO. When AUTO is configured, the
autotuner will set the % DEV to 4 times the % HYS. This is the minimum value needed to provide good autotuning
results.
The % HYS parameter is the amount that the process must deviate from setpoint before switching the output in the
opposite direction. This value must be at least equal to or slightly greater than any process noise band. If the noise
band cannot be determined, the autotuner will compute it at the start of an autotuning exercise when the % HYS
parameter has been configured as AUTO.
The % STEP parameter is the amount that the valve will change on the first on-off cycle. After the first cycle, the
autotuner will adjust the step to keep the process within the value of the % DEV parameter. On subsequent
autotune exercises, the step will use the value computed from the previous exercise unless the AT RESET parameter
is set to YES or the controller has been power cycled. The dynamic response recommended by the autotuner can be
configured as Fast, Medium, or Slow. The Medium setting will normally provide a response that has no or little
overshoot to a setpoint step response.
When the POST AT parameter is set to YES, the control loop will be returned to Auto using the recommended
tuning values unless a warning occurred during the test.
More details on autotuning can be found in the Operation section. PIDAG is an adaptive gain proportional + integral
controller and is one of five controller types that can be
used on a one per loop basis. It uses external feedback to
provide integral action that allows interaction with other
function blocks or external devices, such as pneumatic
controllers, shutoff switches. PIDAG eliminates windup
that can occur with other controller types. Derivative
action is provided when the parameter TD is non-zero. The
controller includes an autotune feature that can be initiated
from the operator faceplate using the quick TUNE feature.
